Free Grade 3 Introduction to Introducing Nets Common Errors Lessons
Free Grade 3 lessons for Introduction to Introducing Nets Common Errors: 12 real questions with a full answer key and worked solutions. Volume is how much space a 3D shape takes up. For a cuboid, multiply length × width × height. Surface area is the total area of all faces.
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20 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introduction to introducing nets common errors
Explain introduction to introducing nets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introduction to introducing nets common errors
Calculate introduction to introducing nets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introduction to introducing nets common errors
Compare introduction to introducing nets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introduction to introducing nets common errors
Justify introduction to introducing nets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
Prerequisites
Close these gaps first — each has its own free lesson, worksheet and quiz.
How Introduction to Introducing Nets Common Errors works
Volume is how much space a 3D shape takes up. For a cuboid, multiply length × width × height. Surface area is the total area of all faces.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.Find the volume of a cuboid 10 cm × 4 cm × 6 cm.[1]
- 2.Find the volume of a cuboid 6 cm × 10 cm × 8 cm.[1]
- 3.Find the volume of a cuboid 9 cm × 5 cm × 9 cm.[1]
- 4.Find the volume of a cuboid 10 cm × 7 cm × 3 cm.[1]
- 5.Find the volume of a cuboid 2 cm × 6 cm × 2 cm.[2]
- 6.Find the volume of a cuboid 2 cm × 9 cm × 2 cm.[2]
- 7.Find the volume of a cuboid 3 cm × 4 cm × 3 cm.[2]
- 8.Find the volume of a cuboid 8 cm × 7 cm × 10 cm.[2]
- 9.Find the surface area of a cuboid 4 cm × 5 cm × 2 cm.[3]
- 10.Find the surface area of a cuboid 8 cm × 3 cm × 8 cm.[3]
- 11.Find the surface area of a cuboid 9 cm × 3 cm × 4 cm.[3]
- 12.Find the surface area of a cuboid 3 cm × 8 cm × 3 cm.[3]
Show answers and working
1. 240 cm³
Volume = length × width × height. 10 × 4 × 6 = 240 cm³.
2. 480 cm³
Volume = length × width × height. 6 × 10 × 8 = 480 cm³.
3. 405 cm³
Volume = length × width × height. 9 × 5 × 9 = 405 cm³.
4. 210 cm³
Volume = length × width × height. 10 × 7 × 3 = 210 cm³.
5. 24 cm³
Volume = length × width × height. 2 × 6 × 2 = 24 cm³.
6. 36 cm³
Volume = length × width × height. 2 × 9 × 2 = 36 cm³.
7. 36 cm³
Volume = length × width × height. 3 × 4 × 3 = 36 cm³.
8. 560 cm³
Volume = length × width × height. 8 × 7 × 10 = 560 cm³.
9. 76 cm²
Three pairs of faces: 20, 10, 8. 2 × (20 + 10 + 8) = 76 cm².
10. 224 cm²
Three pairs of faces: 24, 24, 64. 2 × (24 + 24 + 64) = 224 cm².
11. 150 cm²
Three pairs of faces: 27, 12, 36. 2 × (27 + 12 + 36) = 150 cm².
12. 114 cm²
Three pairs of faces: 24, 24, 9. 2 × (24 + 24 + 9) = 114 cm².
Worked examples
Find the volume of a cuboid 7 cm × 5 cm × 8 cm.
- Volume = length × width × height.
- 7 × 5 × 8 = 280 cm³.
- Answer: 280 cm³
Find the volume of a cuboid 4 cm × 4 cm × 4 cm.
- Volume = length × width × height.
- 4 × 4 × 4 = 64 cm³.
- Answer: 64 cm³
Find the surface area of a cuboid 10 cm × 2 cm × 8 cm.
- Three pairs of faces: 20, 16, 80.
- 2 × (20 + 16 + 80) = 232 cm².
- Answer: 232 cm²
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Adds the dimensions instead of multiplying.
Correction: Volume = l × w × h.
Counts only three faces for surface area.
Correction: A cuboid has six faces — three matching pairs.
Teacher tips
- · Build cuboids from cubes before using the formula.
Parent tips
- · Work out how many sugar cubes fit in a box.
Real-life applications
- · Filling a fish tank, wrapping a present.
Assessment objectives
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Frequently asked
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- What should a learner already know before this?
- Start with Introducing Nets Word Problems. Each one has its own free lesson, worksheet and quiz.
- How is the lesson sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Introduction to Introducing Nets Common Errors?
- Move on to Key Vocabulary of Introducing Nets Common Errors, Rules and Methods in Introducing Nets Common Errors, Working with Introducing Nets Common Errors, Introducing Nets Common Errors in Examinations, which build directly on this idea.
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